|Fetal bovine serum contains a large number of nutritional and macromolecular factors essential for cell growth. It is widely used in a range of applications. One of its primary uses is as commonly used supplements for cell culture medium. FBS contains growth factors, proteins, vitamins, hormones and many other molecules. These molecules play an important role in the growth and maintenance of cells. FBS also contains many small molecules, such as amino acids, sugars and lipids. FBS can protect cells from oxidative damage and apoptosis by delivering growth promoting and survival enhancing factors. In addition to used as supplements, FBS can also be used in the research, manufacture and control of vaccines and drugs, as well as in stopping of trypsin digestion or as a protectant in cryopreservation.